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<div class="title">/data/users/hoss/faiss/MetaIndexes.cpp</div>  </div>
</div><!--header-->
<div class="contents">
<div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno">    1</span>&#160;<span class="comment">/**</span></div>
<div class="line"><a name="l00002"></a><span class="lineno">    2</span>&#160;<span class="comment"> * Copyright (c) Facebook, Inc. and its affiliates.</span></div>
<div class="line"><a name="l00003"></a><span class="lineno">    3</span>&#160;<span class="comment"> *</span></div>
<div class="line"><a name="l00004"></a><span class="lineno">    4</span>&#160;<span class="comment"> * This source code is licensed under the MIT license found in the</span></div>
<div class="line"><a name="l00005"></a><span class="lineno">    5</span>&#160;<span class="comment"> * LICENSE file in the root directory of this source tree.</span></div>
<div class="line"><a name="l00006"></a><span class="lineno">    6</span>&#160;<span class="comment"> */</span></div>
<div class="line"><a name="l00007"></a><span class="lineno">    7</span>&#160;</div>
<div class="line"><a name="l00008"></a><span class="lineno">    8</span>&#160;<span class="comment">// -*- c++ -*-</span></div>
<div class="line"><a name="l00009"></a><span class="lineno">    9</span>&#160;</div>
<div class="line"><a name="l00010"></a><span class="lineno">   10</span>&#160;<span class="preprocessor">#include &quot;MetaIndexes.h&quot;</span></div>
<div class="line"><a name="l00011"></a><span class="lineno">   11</span>&#160;</div>
<div class="line"><a name="l00012"></a><span class="lineno">   12</span>&#160;<span class="preprocessor">#include &lt;cstdio&gt;</span></div>
<div class="line"><a name="l00013"></a><span class="lineno">   13</span>&#160;</div>
<div class="line"><a name="l00014"></a><span class="lineno">   14</span>&#160;<span class="preprocessor">#include &quot;FaissAssert.h&quot;</span></div>
<div class="line"><a name="l00015"></a><span class="lineno">   15</span>&#160;<span class="preprocessor">#include &quot;Heap.h&quot;</span></div>
<div class="line"><a name="l00016"></a><span class="lineno">   16</span>&#160;<span class="preprocessor">#include &quot;AuxIndexStructures.h&quot;</span></div>
<div class="line"><a name="l00017"></a><span class="lineno">   17</span>&#160;<span class="preprocessor">#include &quot;WorkerThread.h&quot;</span></div>
<div class="line"><a name="l00018"></a><span class="lineno">   18</span>&#160;</div>
<div class="line"><a name="l00019"></a><span class="lineno">   19</span>&#160;</div>
<div class="line"><a name="l00020"></a><span class="lineno">   20</span>&#160;<span class="keyword">namespace </span>faiss {</div>
<div class="line"><a name="l00021"></a><span class="lineno">   21</span>&#160;</div>
<div class="line"><a name="l00022"></a><span class="lineno">   22</span>&#160;<span class="keyword">namespace </span>{</div>
<div class="line"><a name="l00023"></a><span class="lineno">   23</span>&#160;</div>
<div class="line"><a name="l00024"></a><span class="lineno">   24</span>&#160;<span class="keyword">typedef</span> <a class="code" href="structfaiss_1_1Index.html#ad3f0d3071f987baabbdd3da4500c87ea">Index::idx_t</a> idx_t;</div>
<div class="line"><a name="l00025"></a><span class="lineno">   25</span>&#160;</div>
<div class="line"><a name="l00026"></a><span class="lineno">   26</span>&#160;} <span class="comment">// namespace</span></div>
<div class="line"><a name="l00027"></a><span class="lineno">   27</span>&#160;</div>
<div class="line"><a name="l00028"></a><span class="lineno">   28</span>&#160;<span class="comment">/*****************************************************</span></div>
<div class="line"><a name="l00029"></a><span class="lineno">   29</span>&#160;<span class="comment"> * IndexIDMap implementation</span></div>
<div class="line"><a name="l00030"></a><span class="lineno">   30</span>&#160;<span class="comment"> *******************************************************/</span></div>
<div class="line"><a name="l00031"></a><span class="lineno">   31</span>&#160;</div>
<div class="line"><a name="l00032"></a><span class="lineno">   32</span>&#160;IndexIDMap::IndexIDMap (Index *index):</div>
<div class="line"><a name="l00033"></a><span class="lineno">   33</span>&#160;    index (index),</div>
<div class="line"><a name="l00034"></a><span class="lineno">   34</span>&#160;    own_fields (false)</div>
<div class="line"><a name="l00035"></a><span class="lineno">   35</span>&#160;{</div>
<div class="line"><a name="l00036"></a><span class="lineno">   36</span>&#160;    FAISS_THROW_IF_NOT_MSG (index-&gt;ntotal == 0, <span class="stringliteral">&quot;index must be empty on input&quot;</span>);</div>
<div class="line"><a name="l00037"></a><span class="lineno">   37</span>&#160;    is_trained = index-&gt;is_trained;</div>
<div class="line"><a name="l00038"></a><span class="lineno">   38</span>&#160;    metric_type = index-&gt;metric_type;</div>
<div class="line"><a name="l00039"></a><span class="lineno">   39</span>&#160;    verbose = index-&gt;verbose;</div>
<div class="line"><a name="l00040"></a><span class="lineno">   40</span>&#160;    d = index-&gt;d;</div>
<div class="line"><a name="l00041"></a><span class="lineno">   41</span>&#160;}</div>
<div class="line"><a name="l00042"></a><span class="lineno">   42</span>&#160;</div>
<div class="line"><a name="l00043"></a><span class="lineno"><a class="line" href="structfaiss_1_1IndexIDMap.html#a16cce6c1e83d0d5f069c9b0399896450">   43</a></span>&#160;<span class="keywordtype">void</span> <a class="code" href="structfaiss_1_1IndexIDMap.html#a16cce6c1e83d0d5f069c9b0399896450">IndexIDMap::add</a> (<a class="code" href="structfaiss_1_1Index.html#ad3f0d3071f987baabbdd3da4500c87ea">idx_t</a>, <span class="keyword">const</span> <span class="keywordtype">float</span> *)</div>
<div class="line"><a name="l00044"></a><span class="lineno">   44</span>&#160;{</div>
<div class="line"><a name="l00045"></a><span class="lineno">   45</span>&#160;    FAISS_THROW_MSG (<span class="stringliteral">&quot;add does not make sense with IndexIDMap, &quot;</span></div>
<div class="line"><a name="l00046"></a><span class="lineno">   46</span>&#160;                      <span class="stringliteral">&quot;use add_with_ids&quot;</span>);</div>
<div class="line"><a name="l00047"></a><span class="lineno">   47</span>&#160;}</div>
<div class="line"><a name="l00048"></a><span class="lineno">   48</span>&#160;</div>
<div class="line"><a name="l00049"></a><span class="lineno">   49</span>&#160;</div>
<div class="line"><a name="l00050"></a><span class="lineno"><a class="line" href="structfaiss_1_1IndexIDMap.html#ac873cb03aa323a06dca5d6f3af5fe559">   50</a></span>&#160;<span class="keywordtype">void</span> <a class="code" href="structfaiss_1_1IndexIDMap.html#ac873cb03aa323a06dca5d6f3af5fe559">IndexIDMap::train</a> (<a class="code" href="structfaiss_1_1Index.html#ad3f0d3071f987baabbdd3da4500c87ea">idx_t</a> n, <span class="keyword">const</span> <span class="keywordtype">float</span> *x)</div>
<div class="line"><a name="l00051"></a><span class="lineno">   51</span>&#160;{</div>
<div class="line"><a name="l00052"></a><span class="lineno">   52</span>&#160;    index-&gt;train (n, x);</div>
<div class="line"><a name="l00053"></a><span class="lineno">   53</span>&#160;    is_trained = index-&gt;is_trained;</div>
<div class="line"><a name="l00054"></a><span class="lineno">   54</span>&#160;}</div>
<div class="line"><a name="l00055"></a><span class="lineno">   55</span>&#160;</div>
<div class="line"><a name="l00056"></a><span class="lineno"><a class="line" href="structfaiss_1_1IndexIDMap.html#a70aca5b0f665c5a109d5dadf1e13b448">   56</a></span>&#160;<span class="keywordtype">void</span> <a class="code" href="structfaiss_1_1IndexIDMap.html#a70aca5b0f665c5a109d5dadf1e13b448">IndexIDMap::reset</a> ()</div>
<div class="line"><a name="l00057"></a><span class="lineno">   57</span>&#160;{</div>
<div class="line"><a name="l00058"></a><span class="lineno">   58</span>&#160;    index-&gt;reset ();</div>
<div class="line"><a name="l00059"></a><span class="lineno">   59</span>&#160;    id_map.clear();</div>
<div class="line"><a name="l00060"></a><span class="lineno">   60</span>&#160;    ntotal = 0;</div>
<div class="line"><a name="l00061"></a><span class="lineno">   61</span>&#160;}</div>
<div class="line"><a name="l00062"></a><span class="lineno">   62</span>&#160;</div>
<div class="line"><a name="l00063"></a><span class="lineno">   63</span>&#160;</div>
<div class="line"><a name="l00064"></a><span class="lineno"><a class="line" href="structfaiss_1_1IndexIDMap.html#aeace75e53648c052d05c357b744e090b">   64</a></span>&#160;<span class="keywordtype">void</span> <a class="code" href="structfaiss_1_1IndexIDMap.html#aeace75e53648c052d05c357b744e090b">IndexIDMap::add_with_ids</a> (<a class="code" href="structfaiss_1_1Index.html#ad3f0d3071f987baabbdd3da4500c87ea">idx_t</a> n, <span class="keyword">const</span> <span class="keywordtype">float</span> * x, <span class="keyword">const</span> <span class="keywordtype">long</span> *xids)</div>
<div class="line"><a name="l00065"></a><span class="lineno">   65</span>&#160;{</div>
<div class="line"><a name="l00066"></a><span class="lineno">   66</span>&#160;    index-&gt;add (n, x);</div>
<div class="line"><a name="l00067"></a><span class="lineno">   67</span>&#160;    <span class="keywordflow">for</span> (<a class="code" href="structfaiss_1_1Index.html#ad3f0d3071f987baabbdd3da4500c87ea">idx_t</a> i = 0; i &lt; n; i++)</div>
<div class="line"><a name="l00068"></a><span class="lineno">   68</span>&#160;        id_map.push_back (xids[i]);</div>
<div class="line"><a name="l00069"></a><span class="lineno">   69</span>&#160;    ntotal = index-&gt;ntotal;</div>
<div class="line"><a name="l00070"></a><span class="lineno">   70</span>&#160;}</div>
<div class="line"><a name="l00071"></a><span class="lineno">   71</span>&#160;</div>
<div class="line"><a name="l00072"></a><span class="lineno">   72</span>&#160;</div>
<div class="line"><a name="l00073"></a><span class="lineno"><a class="line" href="structfaiss_1_1IndexIDMap.html#a2f36fa9150a465b48952afbba856e2a1">   73</a></span>&#160;<span class="keywordtype">void</span> <a class="code" href="structfaiss_1_1IndexIDMap.html#a2f36fa9150a465b48952afbba856e2a1">IndexIDMap::search</a> (<a class="code" href="structfaiss_1_1Index.html#ad3f0d3071f987baabbdd3da4500c87ea">idx_t</a> n, <span class="keyword">const</span> <span class="keywordtype">float</span> *x, <a class="code" href="structfaiss_1_1Index.html#ad3f0d3071f987baabbdd3da4500c87ea">idx_t</a> k,</div>
<div class="line"><a name="l00074"></a><span class="lineno">   74</span>&#160;                              <span class="keywordtype">float</span> *distances, <a class="code" href="structfaiss_1_1Index.html#ad3f0d3071f987baabbdd3da4500c87ea">idx_t</a> *labels)<span class="keyword"> const</span></div>
<div class="line"><a name="l00075"></a><span class="lineno">   75</span>&#160;<span class="keyword"></span>{</div>
<div class="line"><a name="l00076"></a><span class="lineno">   76</span>&#160;    index-&gt;search (n, x, k, distances, labels);</div>
<div class="line"><a name="l00077"></a><span class="lineno">   77</span>&#160;    <a class="code" href="structfaiss_1_1Index.html#ad3f0d3071f987baabbdd3da4500c87ea">idx_t</a> *li = labels;</div>
<div class="line"><a name="l00078"></a><span class="lineno">   78</span>&#160;<span class="preprocessor">#pragma omp parallel for</span></div>
<div class="line"><a name="l00079"></a><span class="lineno">   79</span>&#160;<span class="preprocessor"></span>    <span class="keywordflow">for</span> (<a class="code" href="structfaiss_1_1Index.html#ad3f0d3071f987baabbdd3da4500c87ea">idx_t</a> i = 0; i &lt; n * k; i++) {</div>
<div class="line"><a name="l00080"></a><span class="lineno">   80</span>&#160;        li[i] = li[i] &lt; 0 ? li[i] : id_map[li[i]];</div>
<div class="line"><a name="l00081"></a><span class="lineno">   81</span>&#160;    }</div>
<div class="line"><a name="l00082"></a><span class="lineno">   82</span>&#160;}</div>
<div class="line"><a name="l00083"></a><span class="lineno">   83</span>&#160;</div>
<div class="line"><a name="l00084"></a><span class="lineno">   84</span>&#160;</div>
<div class="line"><a name="l00085"></a><span class="lineno"><a class="line" href="structfaiss_1_1IndexIDMap.html#a7dbeaf9d44d6783d371f12405e8b7f40">   85</a></span>&#160;<span class="keywordtype">void</span> <a class="code" href="structfaiss_1_1IndexIDMap.html#a7dbeaf9d44d6783d371f12405e8b7f40">IndexIDMap::range_search</a> (<a class="code" href="structfaiss_1_1Index.html#ad3f0d3071f987baabbdd3da4500c87ea">idx_t</a> n, <span class="keyword">const</span> <span class="keywordtype">float</span> *x, <span class="keywordtype">float</span> radius,</div>
<div class="line"><a name="l00086"></a><span class="lineno">   86</span>&#160;                   <a class="code" href="structfaiss_1_1RangeSearchResult.html">RangeSearchResult</a> *result)<span class="keyword"> const</span></div>
<div class="line"><a name="l00087"></a><span class="lineno">   87</span>&#160;<span class="keyword"></span>{</div>
<div class="line"><a name="l00088"></a><span class="lineno">   88</span>&#160;  index-&gt;range_search(n, x, radius, result);</div>
<div class="line"><a name="l00089"></a><span class="lineno">   89</span>&#160;<span class="preprocessor">#pragma omp parallel for</span></div>
<div class="line"><a name="l00090"></a><span class="lineno">   90</span>&#160;<span class="preprocessor"></span>  <span class="keywordflow">for</span> (<a class="code" href="structfaiss_1_1Index.html#ad3f0d3071f987baabbdd3da4500c87ea">idx_t</a> i = 0; i &lt; result-&gt;<a class="code" href="structfaiss_1_1RangeSearchResult.html#aef57f9db99ca470c01bcdce0366cb6ff">lims</a>[result-&gt;<a class="code" href="structfaiss_1_1RangeSearchResult.html#a29269b98c33af874d379ca4f62408b90">nq</a>]; i++) {</div>
<div class="line"><a name="l00091"></a><span class="lineno">   91</span>&#160;      result-&gt;<a class="code" href="structfaiss_1_1RangeSearchResult.html#aa8ff848474a4cc16c5464cc4ec187824">labels</a>[i] = result-&gt;<a class="code" href="structfaiss_1_1RangeSearchResult.html#aa8ff848474a4cc16c5464cc4ec187824">labels</a>[i] &lt; 0 ?</div>
<div class="line"><a name="l00092"></a><span class="lineno">   92</span>&#160;        result-&gt;<a class="code" href="structfaiss_1_1RangeSearchResult.html#aa8ff848474a4cc16c5464cc4ec187824">labels</a>[i] : id_map[result-&gt;<a class="code" href="structfaiss_1_1RangeSearchResult.html#aa8ff848474a4cc16c5464cc4ec187824">labels</a>[i]];</div>
<div class="line"><a name="l00093"></a><span class="lineno">   93</span>&#160;  }</div>
<div class="line"><a name="l00094"></a><span class="lineno">   94</span>&#160;}</div>
<div class="line"><a name="l00095"></a><span class="lineno">   95</span>&#160;</div>
<div class="line"><a name="l00096"></a><span class="lineno">   96</span>&#160;<span class="keyword">namespace </span>{</div>
<div class="line"><a name="l00097"></a><span class="lineno">   97</span>&#160;</div>
<div class="line"><a name="l00098"></a><span class="lineno">   98</span>&#160;<span class="keyword">struct </span>IDTranslatedSelector: <a class="code" href="structfaiss_1_1IDSelector.html">IDSelector</a> {</div>
<div class="line"><a name="l00099"></a><span class="lineno">   99</span>&#160;    <span class="keyword">const</span> std::vector &lt;long&gt; &amp; id_map;</div>
<div class="line"><a name="l00100"></a><span class="lineno">  100</span>&#160;    <span class="keyword">const</span> <a class="code" href="structfaiss_1_1IDSelector.html">IDSelector</a> &amp; sel;</div>
<div class="line"><a name="l00101"></a><span class="lineno">  101</span>&#160;    IDTranslatedSelector (<span class="keyword">const</span> std::vector &lt;long&gt; &amp; id_map,</div>
<div class="line"><a name="l00102"></a><span class="lineno">  102</span>&#160;                          <span class="keyword">const</span> <a class="code" href="structfaiss_1_1IDSelector.html">IDSelector</a> &amp; sel):</div>
<div class="line"><a name="l00103"></a><span class="lineno">  103</span>&#160;        id_map (id_map), sel (sel)</div>
<div class="line"><a name="l00104"></a><span class="lineno">  104</span>&#160;    {}</div>
<div class="line"><a name="l00105"></a><span class="lineno">  105</span>&#160;    <span class="keywordtype">bool</span> is_member(idx_t <span class="keywordtype">id</span>)<span class="keyword"> const override </span>{</div>
<div class="line"><a name="l00106"></a><span class="lineno">  106</span>&#160;      <span class="keywordflow">return</span> sel.is_member(id_map[<span class="keywordtype">id</span>]);</div>
<div class="line"><a name="l00107"></a><span class="lineno">  107</span>&#160;    }</div>
<div class="line"><a name="l00108"></a><span class="lineno">  108</span>&#160;};</div>
<div class="line"><a name="l00109"></a><span class="lineno">  109</span>&#160;</div>
<div class="line"><a name="l00110"></a><span class="lineno">  110</span>&#160;}</div>
<div class="line"><a name="l00111"></a><span class="lineno">  111</span>&#160;</div>
<div class="line"><a name="l00112"></a><span class="lineno"><a class="line" href="structfaiss_1_1IndexIDMap.html#a699ca4891bf3a437b2a182c04d33d9b9">  112</a></span>&#160;<span class="keywordtype">long</span> <a class="code" href="structfaiss_1_1IndexIDMap.html#a699ca4891bf3a437b2a182c04d33d9b9">IndexIDMap::remove_ids</a> (<span class="keyword">const</span> <a class="code" href="structfaiss_1_1IDSelector.html">IDSelector</a> &amp; sel)</div>
<div class="line"><a name="l00113"></a><span class="lineno">  113</span>&#160;{</div>
<div class="line"><a name="l00114"></a><span class="lineno">  114</span>&#160;    <span class="comment">// remove in sub-index first</span></div>
<div class="line"><a name="l00115"></a><span class="lineno">  115</span>&#160;    IDTranslatedSelector sel2 (id_map, sel);</div>
<div class="line"><a name="l00116"></a><span class="lineno">  116</span>&#160;    <span class="keywordtype">long</span> nremove = index-&gt;remove_ids (sel2);</div>
<div class="line"><a name="l00117"></a><span class="lineno">  117</span>&#160;</div>
<div class="line"><a name="l00118"></a><span class="lineno">  118</span>&#160;    <span class="keywordtype">long</span> j = 0;</div>
<div class="line"><a name="l00119"></a><span class="lineno">  119</span>&#160;    <span class="keywordflow">for</span> (<a class="code" href="structfaiss_1_1Index.html#ad3f0d3071f987baabbdd3da4500c87ea">idx_t</a> i = 0; i &lt; ntotal; i++) {</div>
<div class="line"><a name="l00120"></a><span class="lineno">  120</span>&#160;        <span class="keywordflow">if</span> (sel.is_member (id_map[i])) {</div>
<div class="line"><a name="l00121"></a><span class="lineno">  121</span>&#160;            <span class="comment">// remove</span></div>
<div class="line"><a name="l00122"></a><span class="lineno">  122</span>&#160;        } <span class="keywordflow">else</span> {</div>
<div class="line"><a name="l00123"></a><span class="lineno">  123</span>&#160;            id_map[j] = id_map[i];</div>
<div class="line"><a name="l00124"></a><span class="lineno">  124</span>&#160;            j++;</div>
<div class="line"><a name="l00125"></a><span class="lineno">  125</span>&#160;        }</div>
<div class="line"><a name="l00126"></a><span class="lineno">  126</span>&#160;    }</div>
<div class="line"><a name="l00127"></a><span class="lineno">  127</span>&#160;    FAISS_ASSERT (j == index-&gt;ntotal);</div>
<div class="line"><a name="l00128"></a><span class="lineno">  128</span>&#160;    ntotal = j;</div>
<div class="line"><a name="l00129"></a><span class="lineno">  129</span>&#160;    id_map.resize(ntotal);</div>
<div class="line"><a name="l00130"></a><span class="lineno">  130</span>&#160;    <span class="keywordflow">return</span> nremove;</div>
<div class="line"><a name="l00131"></a><span class="lineno">  131</span>&#160;}</div>
<div class="line"><a name="l00132"></a><span class="lineno">  132</span>&#160;</div>
<div class="line"><a name="l00133"></a><span class="lineno">  133</span>&#160;</div>
<div class="line"><a name="l00134"></a><span class="lineno">  134</span>&#160;</div>
<div class="line"><a name="l00135"></a><span class="lineno">  135</span>&#160;</div>
<div class="line"><a name="l00136"></a><span class="lineno">  136</span>&#160;IndexIDMap::~IndexIDMap ()</div>
<div class="line"><a name="l00137"></a><span class="lineno">  137</span>&#160;{</div>
<div class="line"><a name="l00138"></a><span class="lineno">  138</span>&#160;    <span class="keywordflow">if</span> (own_fields) <span class="keyword">delete</span> index;</div>
<div class="line"><a name="l00139"></a><span class="lineno">  139</span>&#160;}</div>
<div class="line"><a name="l00140"></a><span class="lineno">  140</span>&#160;</div>
<div class="line"><a name="l00141"></a><span class="lineno">  141</span>&#160;<span class="comment">/*****************************************************</span></div>
<div class="line"><a name="l00142"></a><span class="lineno">  142</span>&#160;<span class="comment"> * IndexIDMap2 implementation</span></div>
<div class="line"><a name="l00143"></a><span class="lineno">  143</span>&#160;<span class="comment"> *******************************************************/</span></div>
<div class="line"><a name="l00144"></a><span class="lineno">  144</span>&#160;</div>
<div class="line"><a name="l00145"></a><span class="lineno">  145</span>&#160;IndexIDMap2::IndexIDMap2 (Index *index): IndexIDMap (index)</div>
<div class="line"><a name="l00146"></a><span class="lineno">  146</span>&#160;{}</div>
<div class="line"><a name="l00147"></a><span class="lineno">  147</span>&#160;</div>
<div class="line"><a name="l00148"></a><span class="lineno"><a class="line" href="structfaiss_1_1IndexIDMap2.html#a33ff76975891695c2fa45ed26fc8eae9">  148</a></span>&#160;<span class="keywordtype">void</span> <a class="code" href="structfaiss_1_1IndexIDMap2.html#a33ff76975891695c2fa45ed26fc8eae9">IndexIDMap2::add_with_ids</a>(idx_t n, <span class="keyword">const</span> <span class="keywordtype">float</span>* x, <span class="keyword">const</span> <span class="keywordtype">long</span>* xids)</div>
<div class="line"><a name="l00149"></a><span class="lineno">  149</span>&#160;{</div>
<div class="line"><a name="l00150"></a><span class="lineno">  150</span>&#160;    <span class="keywordtype">size_t</span> prev_ntotal = <a class="code" href="structfaiss_1_1Index.html#a6970683faa021b7a6f1a0865c0d4eccd">ntotal</a>;</div>
<div class="line"><a name="l00151"></a><span class="lineno">  151</span>&#160;    <a class="code" href="structfaiss_1_1IndexIDMap.html#aeace75e53648c052d05c357b744e090b">IndexIDMap::add_with_ids</a> (n, x, xids);</div>
<div class="line"><a name="l00152"></a><span class="lineno">  152</span>&#160;    <span class="keywordflow">for</span> (<span class="keywordtype">size_t</span> i = prev_ntotal; i &lt; <a class="code" href="structfaiss_1_1Index.html#a6970683faa021b7a6f1a0865c0d4eccd">ntotal</a>; i++) {</div>
<div class="line"><a name="l00153"></a><span class="lineno">  153</span>&#160;        rev_map [<a class="code" href="structfaiss_1_1IndexIDMap.html#ad1cc5658f1879f6a2b00d76cca58cf3b">id_map</a> [i]] = i;</div>
<div class="line"><a name="l00154"></a><span class="lineno">  154</span>&#160;    }</div>
<div class="line"><a name="l00155"></a><span class="lineno">  155</span>&#160;}</div>
<div class="line"><a name="l00156"></a><span class="lineno">  156</span>&#160;</div>
<div class="line"><a name="l00157"></a><span class="lineno"><a class="line" href="structfaiss_1_1IndexIDMap2.html#a646302669189e370d9d864fc18f096fe">  157</a></span>&#160;<span class="keywordtype">void</span> <a class="code" href="structfaiss_1_1IndexIDMap2.html#a646302669189e370d9d864fc18f096fe">IndexIDMap2::construct_rev_map</a> ()</div>
<div class="line"><a name="l00158"></a><span class="lineno">  158</span>&#160;{</div>
<div class="line"><a name="l00159"></a><span class="lineno">  159</span>&#160;    rev_map.clear ();</div>
<div class="line"><a name="l00160"></a><span class="lineno">  160</span>&#160;    <span class="keywordflow">for</span> (<span class="keywordtype">size_t</span> i = 0; i &lt; <a class="code" href="structfaiss_1_1Index.html#a6970683faa021b7a6f1a0865c0d4eccd">ntotal</a>; i++) {</div>
<div class="line"><a name="l00161"></a><span class="lineno">  161</span>&#160;        rev_map [<a class="code" href="structfaiss_1_1IndexIDMap.html#ad1cc5658f1879f6a2b00d76cca58cf3b">id_map</a> [i]] = i;</div>
<div class="line"><a name="l00162"></a><span class="lineno">  162</span>&#160;    }</div>
<div class="line"><a name="l00163"></a><span class="lineno">  163</span>&#160;}</div>
<div class="line"><a name="l00164"></a><span class="lineno">  164</span>&#160;</div>
<div class="line"><a name="l00165"></a><span class="lineno">  165</span>&#160;</div>
<div class="line"><a name="l00166"></a><span class="lineno"><a class="line" href="structfaiss_1_1IndexIDMap2.html#a87e313ebc8dd62fb734a61a6d95a98f0">  166</a></span>&#160;<span class="keywordtype">long</span> <a class="code" href="structfaiss_1_1IndexIDMap2.html#a87e313ebc8dd62fb734a61a6d95a98f0">IndexIDMap2::remove_ids</a>(<span class="keyword">const</span> <a class="code" href="structfaiss_1_1IDSelector.html">IDSelector</a>&amp; sel)</div>
<div class="line"><a name="l00167"></a><span class="lineno">  167</span>&#160;{</div>
<div class="line"><a name="l00168"></a><span class="lineno">  168</span>&#160;    <span class="comment">// This is quite inefficient</span></div>
<div class="line"><a name="l00169"></a><span class="lineno">  169</span>&#160;    <span class="keywordtype">long</span> nremove = <a class="code" href="structfaiss_1_1IndexIDMap.html#a699ca4891bf3a437b2a182c04d33d9b9">IndexIDMap::remove_ids</a> (sel);</div>
<div class="line"><a name="l00170"></a><span class="lineno">  170</span>&#160;    <a class="code" href="structfaiss_1_1IndexIDMap2.html#a646302669189e370d9d864fc18f096fe">construct_rev_map</a> ();</div>
<div class="line"><a name="l00171"></a><span class="lineno">  171</span>&#160;    <span class="keywordflow">return</span> nremove;</div>
<div class="line"><a name="l00172"></a><span class="lineno">  172</span>&#160;}</div>
<div class="line"><a name="l00173"></a><span class="lineno">  173</span>&#160;</div>
<div class="line"><a name="l00174"></a><span class="lineno"><a class="line" href="structfaiss_1_1IndexIDMap2.html#a3660adb35a3299bc328988f5ff2199fe">  174</a></span>&#160;<span class="keywordtype">void</span> <a class="code" href="structfaiss_1_1IndexIDMap2.html#a3660adb35a3299bc328988f5ff2199fe">IndexIDMap2::reconstruct</a> (idx_t key, <span class="keywordtype">float</span> * recons)<span class="keyword"> const</span></div>
<div class="line"><a name="l00175"></a><span class="lineno">  175</span>&#160;<span class="keyword"></span>{</div>
<div class="line"><a name="l00176"></a><span class="lineno">  176</span>&#160;    <span class="keywordflow">try</span> {</div>
<div class="line"><a name="l00177"></a><span class="lineno">  177</span>&#160;        index-&gt;<a class="code" href="structfaiss_1_1Index.html#aaef6f4132b1f390121ebb11058baf190">reconstruct</a> (rev_map.at (key), recons);</div>
<div class="line"><a name="l00178"></a><span class="lineno">  178</span>&#160;    } <span class="keywordflow">catch</span> (<span class="keyword">const</span> std::out_of_range&amp; e) {</div>
<div class="line"><a name="l00179"></a><span class="lineno">  179</span>&#160;        FAISS_THROW_FMT (<span class="stringliteral">&quot;key %ld not found&quot;</span>, key);</div>
<div class="line"><a name="l00180"></a><span class="lineno">  180</span>&#160;    }</div>
<div class="line"><a name="l00181"></a><span class="lineno">  181</span>&#160;}</div>
<div class="line"><a name="l00182"></a><span class="lineno">  182</span>&#160;</div>
<div class="line"><a name="l00183"></a><span class="lineno">  183</span>&#160;<span class="comment">/*****************************************************</span></div>
<div class="line"><a name="l00184"></a><span class="lineno">  184</span>&#160;<span class="comment"> * IndexSplitVectors implementation</span></div>
<div class="line"><a name="l00185"></a><span class="lineno">  185</span>&#160;<span class="comment"> *******************************************************/</span></div>
<div class="line"><a name="l00186"></a><span class="lineno">  186</span>&#160;</div>
<div class="line"><a name="l00187"></a><span class="lineno">  187</span>&#160;</div>
<div class="line"><a name="l00188"></a><span class="lineno"><a class="line" href="structfaiss_1_1IndexSplitVectors.html#a70ba3367a08722fe4466dc49c21a4d2b">  188</a></span>&#160;<a class="code" href="structfaiss_1_1IndexSplitVectors.html#a70ba3367a08722fe4466dc49c21a4d2b">IndexSplitVectors::IndexSplitVectors</a> (<a class="code" href="structfaiss_1_1Index.html#ad3f0d3071f987baabbdd3da4500c87ea">idx_t</a> d, <span class="keywordtype">bool</span> threaded):</div>
<div class="line"><a name="l00189"></a><span class="lineno">  189</span>&#160;    <a class="code" href="structfaiss_1_1Index.html">Index</a> (d), own_fields (false),</div>
<div class="line"><a name="l00190"></a><span class="lineno">  190</span>&#160;    threaded (threaded), sum_d (0)</div>
<div class="line"><a name="l00191"></a><span class="lineno">  191</span>&#160;{</div>
<div class="line"><a name="l00192"></a><span class="lineno">  192</span>&#160;</div>
<div class="line"><a name="l00193"></a><span class="lineno">  193</span>&#160;}</div>
<div class="line"><a name="l00194"></a><span class="lineno">  194</span>&#160;</div>
<div class="line"><a name="l00195"></a><span class="lineno">  195</span>&#160;<span class="keywordtype">void</span> IndexSplitVectors::add_sub_index (<a class="code" href="structfaiss_1_1Index.html">Index</a> *index)</div>
<div class="line"><a name="l00196"></a><span class="lineno">  196</span>&#160;{</div>
<div class="line"><a name="l00197"></a><span class="lineno">  197</span>&#160;    sub_indexes.push_back (index);</div>
<div class="line"><a name="l00198"></a><span class="lineno">  198</span>&#160;    sync_with_sub_indexes ();</div>
<div class="line"><a name="l00199"></a><span class="lineno">  199</span>&#160;}</div>
<div class="line"><a name="l00200"></a><span class="lineno">  200</span>&#160;</div>
<div class="line"><a name="l00201"></a><span class="lineno">  201</span>&#160;<span class="keywordtype">void</span> IndexSplitVectors::sync_with_sub_indexes ()</div>
<div class="line"><a name="l00202"></a><span class="lineno">  202</span>&#160;{</div>
<div class="line"><a name="l00203"></a><span class="lineno">  203</span>&#160;    <span class="keywordflow">if</span> (sub_indexes.empty()) <span class="keywordflow">return</span>;</div>
<div class="line"><a name="l00204"></a><span class="lineno">  204</span>&#160;    Index * index0 = sub_indexes[0];</div>
<div class="line"><a name="l00205"></a><span class="lineno">  205</span>&#160;    sum_d = index0-&gt;d;</div>
<div class="line"><a name="l00206"></a><span class="lineno">  206</span>&#160;    <a class="code" href="structfaiss_1_1Index.html#a8e18f641854b2bde83ecff0a2f9a6f4e">metric_type</a> = index0-&gt;metric_type;</div>
<div class="line"><a name="l00207"></a><span class="lineno">  207</span>&#160;    <a class="code" href="structfaiss_1_1Index.html#a6e92732617c4dbe364e7678dd8773a7f">is_trained</a> = index0-&gt;is_trained;</div>
<div class="line"><a name="l00208"></a><span class="lineno">  208</span>&#160;    <a class="code" href="structfaiss_1_1Index.html#a6970683faa021b7a6f1a0865c0d4eccd">ntotal</a> = index0-&gt;ntotal;</div>
<div class="line"><a name="l00209"></a><span class="lineno">  209</span>&#160;    <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 1; i &lt; sub_indexes.size(); i++) {</div>
<div class="line"><a name="l00210"></a><span class="lineno">  210</span>&#160;        Index * index = sub_indexes[i];</div>
<div class="line"><a name="l00211"></a><span class="lineno">  211</span>&#160;        FAISS_THROW_IF_NOT (<a class="code" href="structfaiss_1_1Index.html#a8e18f641854b2bde83ecff0a2f9a6f4e">metric_type</a> == index-&gt;metric_type);</div>
<div class="line"><a name="l00212"></a><span class="lineno">  212</span>&#160;        FAISS_THROW_IF_NOT (<a class="code" href="structfaiss_1_1Index.html#a6970683faa021b7a6f1a0865c0d4eccd">ntotal</a> == index-&gt;ntotal);</div>
<div class="line"><a name="l00213"></a><span class="lineno">  213</span>&#160;        sum_d += index-&gt;d;</div>
<div class="line"><a name="l00214"></a><span class="lineno">  214</span>&#160;    }</div>
<div class="line"><a name="l00215"></a><span class="lineno">  215</span>&#160;</div>
<div class="line"><a name="l00216"></a><span class="lineno">  216</span>&#160;}</div>
<div class="line"><a name="l00217"></a><span class="lineno">  217</span>&#160;</div>
<div class="line"><a name="l00218"></a><span class="lineno"><a class="line" href="structfaiss_1_1IndexSplitVectors.html#af2ef88dc72b4a94f1190ecc8cb25881b">  218</a></span>&#160;<span class="keywordtype">void</span> <a class="code" href="structfaiss_1_1IndexSplitVectors.html#af2ef88dc72b4a94f1190ecc8cb25881b">IndexSplitVectors::add</a>(<a class="code" href="structfaiss_1_1Index.html#ad3f0d3071f987baabbdd3da4500c87ea">idx_t</a> <span class="comment">/*n*/</span>, <span class="keyword">const</span> <span class="keywordtype">float</span>* <span class="comment">/*x*/</span>) {</div>
<div class="line"><a name="l00219"></a><span class="lineno">  219</span>&#160;  FAISS_THROW_MSG(<span class="stringliteral">&quot;not implemented&quot;</span>);</div>
<div class="line"><a name="l00220"></a><span class="lineno">  220</span>&#160;}</div>
<div class="line"><a name="l00221"></a><span class="lineno">  221</span>&#160;</div>
<div class="line"><a name="l00222"></a><span class="lineno">  222</span>&#160;</div>
<div class="line"><a name="l00223"></a><span class="lineno">  223</span>&#160;</div>
<div class="line"><a name="l00224"></a><span class="lineno"><a class="line" href="structfaiss_1_1IndexSplitVectors.html#a4a010daf51e44d9717e94400cc23c159">  224</a></span>&#160;<span class="keywordtype">void</span> <a class="code" href="structfaiss_1_1IndexSplitVectors.html#a4a010daf51e44d9717e94400cc23c159">IndexSplitVectors::search</a> (</div>
<div class="line"><a name="l00225"></a><span class="lineno">  225</span>&#160;           <a class="code" href="structfaiss_1_1Index.html#ad3f0d3071f987baabbdd3da4500c87ea">idx_t</a> n, <span class="keyword">const</span> <span class="keywordtype">float</span> *x, <a class="code" href="structfaiss_1_1Index.html#ad3f0d3071f987baabbdd3da4500c87ea">idx_t</a> k,</div>
<div class="line"><a name="l00226"></a><span class="lineno">  226</span>&#160;           <span class="keywordtype">float</span> *distances, <a class="code" href="structfaiss_1_1Index.html#ad3f0d3071f987baabbdd3da4500c87ea">idx_t</a> *labels)<span class="keyword"> const</span></div>
<div class="line"><a name="l00227"></a><span class="lineno">  227</span>&#160;<span class="keyword"></span>{</div>
<div class="line"><a name="l00228"></a><span class="lineno">  228</span>&#160;    FAISS_THROW_IF_NOT_MSG (k == 1,</div>
<div class="line"><a name="l00229"></a><span class="lineno">  229</span>&#160;                      <span class="stringliteral">&quot;search implemented only for k=1&quot;</span>);</div>
<div class="line"><a name="l00230"></a><span class="lineno">  230</span>&#160;    FAISS_THROW_IF_NOT_MSG (sum_d == <a class="code" href="structfaiss_1_1Index.html#a2a002388d2c081c2dbab8508dcefe73d">d</a>,</div>
<div class="line"><a name="l00231"></a><span class="lineno">  231</span>&#160;                      <span class="stringliteral">&quot;not enough indexes compared to # dimensions&quot;</span>);</div>
<div class="line"><a name="l00232"></a><span class="lineno">  232</span>&#160;</div>
<div class="line"><a name="l00233"></a><span class="lineno">  233</span>&#160;    <span class="keywordtype">long</span> nshard = sub_indexes.size();</div>
<div class="line"><a name="l00234"></a><span class="lineno">  234</span>&#160;    <span class="keywordtype">float</span> *all_distances = <span class="keyword">new</span> <span class="keywordtype">float</span> [nshard * k * n];</div>
<div class="line"><a name="l00235"></a><span class="lineno">  235</span>&#160;    <a class="code" href="structfaiss_1_1Index.html#ad3f0d3071f987baabbdd3da4500c87ea">idx_t</a> *all_labels = <span class="keyword">new</span> <a class="code" href="structfaiss_1_1Index.html#ad3f0d3071f987baabbdd3da4500c87ea">idx_t</a> [nshard * k * n];</div>
<div class="line"><a name="l00236"></a><span class="lineno">  236</span>&#160;    <a class="code" href="structfaiss_1_1ScopeDeleter.html">ScopeDeleter&lt;float&gt;</a> del (all_distances);</div>
<div class="line"><a name="l00237"></a><span class="lineno">  237</span>&#160;    <a class="code" href="structfaiss_1_1ScopeDeleter.html">ScopeDeleter&lt;idx_t&gt;</a> del2 (all_labels);</div>
<div class="line"><a name="l00238"></a><span class="lineno">  238</span>&#160;</div>
<div class="line"><a name="l00239"></a><span class="lineno">  239</span>&#160;    <span class="keyword">auto</span> query_func = [n, x, k, distances, labels, all_distances, all_labels, <span class="keyword">this</span>]</div>
<div class="line"><a name="l00240"></a><span class="lineno">  240</span>&#160;        (<span class="keywordtype">int</span> no) {</div>
<div class="line"><a name="l00241"></a><span class="lineno">  241</span>&#160;        <span class="keyword">const</span> <a class="code" href="structfaiss_1_1IndexSplitVectors.html">IndexSplitVectors</a> *index = <span class="keyword">this</span>;</div>
<div class="line"><a name="l00242"></a><span class="lineno">  242</span>&#160;        <span class="keywordtype">float</span> *distances1 = no == 0 ? distances : all_distances + no * k * n;</div>
<div class="line"><a name="l00243"></a><span class="lineno">  243</span>&#160;        <a class="code" href="structfaiss_1_1Index.html#ad3f0d3071f987baabbdd3da4500c87ea">idx_t</a> *labels1 = no == 0 ? labels : all_labels + no * k * n;</div>
<div class="line"><a name="l00244"></a><span class="lineno">  244</span>&#160;        <span class="keywordflow">if</span> (index-&gt;<a class="code" href="structfaiss_1_1Index.html#a5590d847c5c2b958affd2a05e58a6f23">verbose</a>)</div>
<div class="line"><a name="l00245"></a><span class="lineno">  245</span>&#160;            printf (<span class="stringliteral">&quot;begin query shard %d on %ld points\n&quot;</span>, no, n);</div>
<div class="line"><a name="l00246"></a><span class="lineno">  246</span>&#160;        <span class="keyword">const</span> <a class="code" href="structfaiss_1_1Index.html">Index</a> * sub_index = index-&gt;sub_indexes[no];</div>
<div class="line"><a name="l00247"></a><span class="lineno">  247</span>&#160;        <span class="keywordtype">long</span> sub_d = sub_index-&gt;<a class="code" href="structfaiss_1_1Index.html#a2a002388d2c081c2dbab8508dcefe73d">d</a>, <a class="code" href="structfaiss_1_1Index.html#a2a002388d2c081c2dbab8508dcefe73d">d</a> = index-&gt;<a class="code" href="structfaiss_1_1Index.html#a2a002388d2c081c2dbab8508dcefe73d">d</a>;</div>
<div class="line"><a name="l00248"></a><span class="lineno">  248</span>&#160;        <a class="code" href="structfaiss_1_1Index.html#ad3f0d3071f987baabbdd3da4500c87ea">idx_t</a> ofs = 0;</div>
<div class="line"><a name="l00249"></a><span class="lineno">  249</span>&#160;        <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i &lt; no; i++) ofs += index-&gt;sub_indexes[i]-&gt;d;</div>
<div class="line"><a name="l00250"></a><span class="lineno">  250</span>&#160;        <span class="keywordtype">float</span> *sub_x = <span class="keyword">new</span> <span class="keywordtype">float</span> [sub_d * n];</div>
<div class="line"><a name="l00251"></a><span class="lineno">  251</span>&#160;        <a class="code" href="structfaiss_1_1ScopeDeleter.html">ScopeDeleter&lt;float&gt;</a> del1 (sub_x);</div>
<div class="line"><a name="l00252"></a><span class="lineno">  252</span>&#160;        <span class="keywordflow">for</span> (<a class="code" href="structfaiss_1_1Index.html#ad3f0d3071f987baabbdd3da4500c87ea">idx_t</a> i = 0; i &lt; n; i++)</div>
<div class="line"><a name="l00253"></a><span class="lineno">  253</span>&#160;            memcpy (sub_x + i * sub_d, x + ofs + i * <a class="code" href="structfaiss_1_1Index.html#a2a002388d2c081c2dbab8508dcefe73d">d</a>, sub_d * <span class="keyword">sizeof</span> (sub_x));</div>
<div class="line"><a name="l00254"></a><span class="lineno">  254</span>&#160;        sub_index-&gt;<a class="code" href="structfaiss_1_1Index.html#aced51b1ebc33c47ab3ae15ea906559a7">search</a> (n, sub_x, k, distances1, labels1);</div>
<div class="line"><a name="l00255"></a><span class="lineno">  255</span>&#160;        <span class="keywordflow">if</span> (index-&gt;<a class="code" href="structfaiss_1_1Index.html#a5590d847c5c2b958affd2a05e58a6f23">verbose</a>)</div>
<div class="line"><a name="l00256"></a><span class="lineno">  256</span>&#160;            printf (<span class="stringliteral">&quot;end query shard %d\n&quot;</span>, no);</div>
<div class="line"><a name="l00257"></a><span class="lineno">  257</span>&#160;    };</div>
<div class="line"><a name="l00258"></a><span class="lineno">  258</span>&#160;</div>
<div class="line"><a name="l00259"></a><span class="lineno">  259</span>&#160;    <span class="keywordflow">if</span> (!threaded) {</div>
<div class="line"><a name="l00260"></a><span class="lineno">  260</span>&#160;        <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i &lt; nshard; i++) {</div>
<div class="line"><a name="l00261"></a><span class="lineno">  261</span>&#160;            query_func(i);</div>
<div class="line"><a name="l00262"></a><span class="lineno">  262</span>&#160;        }</div>
<div class="line"><a name="l00263"></a><span class="lineno">  263</span>&#160;    } <span class="keywordflow">else</span> {</div>
<div class="line"><a name="l00264"></a><span class="lineno">  264</span>&#160;        std::vector&lt;std::unique_ptr&lt;WorkerThread&gt; &gt; threads;</div>
<div class="line"><a name="l00265"></a><span class="lineno">  265</span>&#160;        std::vector&lt;std::future&lt;bool&gt;&gt; v;</div>
<div class="line"><a name="l00266"></a><span class="lineno">  266</span>&#160;</div>
<div class="line"><a name="l00267"></a><span class="lineno">  267</span>&#160;        <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i &lt; nshard; i++) {</div>
<div class="line"><a name="l00268"></a><span class="lineno">  268</span>&#160;            threads.emplace_back(<span class="keyword">new</span> <a class="code" href="classfaiss_1_1WorkerThread.html">WorkerThread</a>());</div>
<div class="line"><a name="l00269"></a><span class="lineno">  269</span>&#160;            <a class="code" href="classfaiss_1_1WorkerThread.html">WorkerThread</a> *wt = threads.back().get();</div>
<div class="line"><a name="l00270"></a><span class="lineno">  270</span>&#160;            v.emplace_back(wt-&gt;<a class="code" href="classfaiss_1_1WorkerThread.html#a484b472c878bb35e4fed5f5ec6733d79">add</a>([i, query_func](){query_func(i); }));</div>
<div class="line"><a name="l00271"></a><span class="lineno">  271</span>&#160;        }</div>
<div class="line"><a name="l00272"></a><span class="lineno">  272</span>&#160;</div>
<div class="line"><a name="l00273"></a><span class="lineno">  273</span>&#160;        <span class="comment">// Blocking wait for completion</span></div>
<div class="line"><a name="l00274"></a><span class="lineno">  274</span>&#160;        <span class="keywordflow">for</span> (<span class="keyword">auto</span>&amp; func : v) {</div>
<div class="line"><a name="l00275"></a><span class="lineno">  275</span>&#160;            func.get();</div>
<div class="line"><a name="l00276"></a><span class="lineno">  276</span>&#160;        }</div>
<div class="line"><a name="l00277"></a><span class="lineno">  277</span>&#160;    }</div>
<div class="line"><a name="l00278"></a><span class="lineno">  278</span>&#160;</div>
<div class="line"><a name="l00279"></a><span class="lineno">  279</span>&#160;    <span class="keywordtype">long</span> factor = 1;</div>
<div class="line"><a name="l00280"></a><span class="lineno">  280</span>&#160;    <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i &lt; nshard; i++) {</div>
<div class="line"><a name="l00281"></a><span class="lineno">  281</span>&#160;        <span class="keywordflow">if</span> (i &gt; 0) { <span class="comment">// results of 0 are already in the table</span></div>
<div class="line"><a name="l00282"></a><span class="lineno">  282</span>&#160;            <span class="keyword">const</span> <span class="keywordtype">float</span> *distances_i = all_distances + i * k * n;</div>
<div class="line"><a name="l00283"></a><span class="lineno">  283</span>&#160;            <span class="keyword">const</span> idx_t *labels_i = all_labels + i * k * n;</div>
<div class="line"><a name="l00284"></a><span class="lineno">  284</span>&#160;            <span class="keywordflow">for</span> (<span class="keywordtype">long</span> j = 0; j &lt; n; j++) {</div>
<div class="line"><a name="l00285"></a><span class="lineno">  285</span>&#160;                <span class="keywordflow">if</span> (labels[j] &gt;= 0 &amp;&amp; labels_i[j] &gt;= 0) {</div>
<div class="line"><a name="l00286"></a><span class="lineno">  286</span>&#160;                    labels[j] += labels_i[j] * factor;</div>
<div class="line"><a name="l00287"></a><span class="lineno">  287</span>&#160;                    distances[j] += distances_i[j];</div>
<div class="line"><a name="l00288"></a><span class="lineno">  288</span>&#160;                } <span class="keywordflow">else</span> {</div>
<div class="line"><a name="l00289"></a><span class="lineno">  289</span>&#160;                    labels[j] = -1;</div>
<div class="line"><a name="l00290"></a><span class="lineno">  290</span>&#160;                    distances[j] = 0.0 / 0.0;</div>
<div class="line"><a name="l00291"></a><span class="lineno">  291</span>&#160;                }</div>
<div class="line"><a name="l00292"></a><span class="lineno">  292</span>&#160;            }</div>
<div class="line"><a name="l00293"></a><span class="lineno">  293</span>&#160;        }</div>
<div class="line"><a name="l00294"></a><span class="lineno">  294</span>&#160;        factor *= sub_indexes[i]-&gt;ntotal;</div>
<div class="line"><a name="l00295"></a><span class="lineno">  295</span>&#160;    }</div>
<div class="line"><a name="l00296"></a><span class="lineno">  296</span>&#160;</div>
<div class="line"><a name="l00297"></a><span class="lineno">  297</span>&#160;}</div>
<div class="line"><a name="l00298"></a><span class="lineno">  298</span>&#160;</div>
<div class="line"><a name="l00299"></a><span class="lineno"><a class="line" href="structfaiss_1_1IndexSplitVectors.html#aafa4c780e325855fe247052453967845">  299</a></span>&#160;<span class="keywordtype">void</span> IndexSplitVectors::train(<a class="code" href="structfaiss_1_1Index.html#ad3f0d3071f987baabbdd3da4500c87ea">idx_t</a> <span class="comment">/*n*/</span>, <span class="keyword">const</span> <span class="keywordtype">float</span>* <span class="comment">/*x*/</span>) {</div>
<div class="line"><a name="l00300"></a><span class="lineno">  300</span>&#160;  FAISS_THROW_MSG(<span class="stringliteral">&quot;not implemented&quot;</span>);</div>
<div class="line"><a name="l00301"></a><span class="lineno">  301</span>&#160;}</div>
<div class="line"><a name="l00302"></a><span class="lineno">  302</span>&#160;</div>
<div class="line"><a name="l00303"></a><span class="lineno"><a class="line" href="structfaiss_1_1IndexSplitVectors.html#a8047981cb8d10c54107664c4955df402">  303</a></span>&#160;<span class="keywordtype">void</span> IndexSplitVectors::reset ()</div>
<div class="line"><a name="l00304"></a><span class="lineno">  304</span>&#160;{</div>
<div class="line"><a name="l00305"></a><span class="lineno">  305</span>&#160;    FAISS_THROW_MSG (<span class="stringliteral">&quot;not implemented&quot;</span>);</div>
<div class="line"><a name="l00306"></a><span class="lineno">  306</span>&#160;}</div>
<div class="line"><a name="l00307"></a><span class="lineno">  307</span>&#160;</div>
<div class="line"><a name="l00308"></a><span class="lineno">  308</span>&#160;</div>
<div class="line"><a name="l00309"></a><span class="lineno">  309</span>&#160;IndexSplitVectors::~IndexSplitVectors ()</div>
<div class="line"><a name="l00310"></a><span class="lineno">  310</span>&#160;{</div>
<div class="line"><a name="l00311"></a><span class="lineno">  311</span>&#160;    <span class="keywordflow">if</span> (own_fields) {</div>
<div class="line"><a name="l00312"></a><span class="lineno">  312</span>&#160;        <span class="keywordflow">for</span> (<span class="keywordtype">int</span> s = 0; s &lt; sub_indexes.size(); s++)</div>
<div class="line"><a name="l00313"></a><span class="lineno">  313</span>&#160;            <span class="keyword">delete</span> sub_indexes [s];</div>
<div class="line"><a name="l00314"></a><span class="lineno">  314</span>&#160;    }</div>
<div class="line"><a name="l00315"></a><span class="lineno">  315</span>&#160;}</div>
<div class="line"><a name="l00316"></a><span class="lineno">  316</span>&#160;</div>
<div class="line"><a name="l00317"></a><span class="lineno">  317</span>&#160;</div>
<div class="line"><a name="l00318"></a><span class="lineno">  318</span>&#160;} <span class="comment">// namespace faiss</span></div>
<div class="ttc" id="structfaiss_1_1RangeSearchResult_html_a29269b98c33af874d379ca4f62408b90"><div class="ttname"><a href="structfaiss_1_1RangeSearchResult.html#a29269b98c33af874d379ca4f62408b90">faiss::RangeSearchResult::nq</a></div><div class="ttdeci">size_t nq</div><div class="ttdoc">nb of queries </div><div class="ttdef"><b>Definition:</b> <a href="AuxIndexStructures_8h_source.html#l00032">AuxIndexStructures.h:32</a></div></div>
<div class="ttc" id="structfaiss_1_1IndexIDMap_html_a2f36fa9150a465b48952afbba856e2a1"><div class="ttname"><a href="structfaiss_1_1IndexIDMap.html#a2f36fa9150a465b48952afbba856e2a1">faiss::IndexIDMap::search</a></div><div class="ttdeci">void search(idx_t n, const float *x, idx_t k, float *distances, idx_t *labels) const override</div><div class="ttdef"><b>Definition:</b> <a href="MetaIndexes_8cpp_source.html#l00073">MetaIndexes.cpp:73</a></div></div>
<div class="ttc" id="structfaiss_1_1IDSelector_html"><div class="ttname"><a href="structfaiss_1_1IDSelector.html">faiss::IDSelector</a></div><div class="ttdef"><b>Definition:</b> <a href="AuxIndexStructures_8h_source.html#l00054">AuxIndexStructures.h:54</a></div></div>
<div class="ttc" id="structfaiss_1_1IndexIDMap2_html_a33ff76975891695c2fa45ed26fc8eae9"><div class="ttname"><a href="structfaiss_1_1IndexIDMap2.html#a33ff76975891695c2fa45ed26fc8eae9">faiss::IndexIDMap2::add_with_ids</a></div><div class="ttdeci">void add_with_ids(idx_t n, const float *x, const long *xids) override</div><div class="ttdef"><b>Definition:</b> <a href="MetaIndexes_8cpp_source.html#l00148">MetaIndexes.cpp:148</a></div></div>
<div class="ttc" id="structfaiss_1_1ScopeDeleter_html"><div class="ttname"><a href="structfaiss_1_1ScopeDeleter.html">faiss::ScopeDeleter</a></div><div class="ttdef"><b>Definition:</b> <a href="FaissException_8h_source.html#l00045">FaissException.h:45</a></div></div>
<div class="ttc" id="structfaiss_1_1IndexIDMap_html_a16cce6c1e83d0d5f069c9b0399896450"><div class="ttname"><a href="structfaiss_1_1IndexIDMap.html#a16cce6c1e83d0d5f069c9b0399896450">faiss::IndexIDMap::add</a></div><div class="ttdeci">void add(idx_t n, const float *x) override</div><div class="ttdoc">this will fail. Use add_with_ids </div><div class="ttdef"><b>Definition:</b> <a href="MetaIndexes_8cpp_source.html#l00043">MetaIndexes.cpp:43</a></div></div>
<div class="ttc" id="structfaiss_1_1IndexSplitVectors_html"><div class="ttname"><a href="structfaiss_1_1IndexSplitVectors.html">faiss::IndexSplitVectors</a></div><div class="ttdef"><b>Definition:</b> <a href="MetaIndexes_8h_source.html#l00082">MetaIndexes.h:82</a></div></div>
<div class="ttc" id="structfaiss_1_1Index_html_a2a002388d2c081c2dbab8508dcefe73d"><div class="ttname"><a href="structfaiss_1_1Index.html#a2a002388d2c081c2dbab8508dcefe73d">faiss::Index::d</a></div><div class="ttdeci">int d</div><div class="ttdoc">vector dimension </div><div class="ttdef"><b>Definition:</b> <a href="Index_8h_source.html#l00066">Index.h:66</a></div></div>
<div class="ttc" id="structfaiss_1_1Index_html_ad3f0d3071f987baabbdd3da4500c87ea"><div class="ttname"><a href="structfaiss_1_1Index.html#ad3f0d3071f987baabbdd3da4500c87ea">faiss::Index::idx_t</a></div><div class="ttdeci">long idx_t</div><div class="ttdoc">all indices are this type </div><div class="ttdef"><b>Definition:</b> <a href="Index_8h_source.html#l00062">Index.h:62</a></div></div>
<div class="ttc" id="structfaiss_1_1IndexIDMap_html_ad1cc5658f1879f6a2b00d76cca58cf3b"><div class="ttname"><a href="structfaiss_1_1IndexIDMap.html#ad1cc5658f1879f6a2b00d76cca58cf3b">faiss::IndexIDMap::id_map</a></div><div class="ttdeci">std::vector&lt; long &gt; id_map</div><div class="ttdoc">! whether pointers are deleted in destructo </div><div class="ttdef"><b>Definition:</b> <a href="MetaIndexes_8h_source.html#l00025">MetaIndexes.h:25</a></div></div>
<div class="ttc" id="structfaiss_1_1IndexIDMap_html_a7dbeaf9d44d6783d371f12405e8b7f40"><div class="ttname"><a href="structfaiss_1_1IndexIDMap.html#a7dbeaf9d44d6783d371f12405e8b7f40">faiss::IndexIDMap::range_search</a></div><div class="ttdeci">void range_search(idx_t n, const float *x, float radius, RangeSearchResult *result) const override</div><div class="ttdef"><b>Definition:</b> <a href="MetaIndexes_8cpp_source.html#l00085">MetaIndexes.cpp:85</a></div></div>
<div class="ttc" id="structfaiss_1_1Index_html_a6970683faa021b7a6f1a0865c0d4eccd"><div class="ttname"><a href="structfaiss_1_1Index.html#a6970683faa021b7a6f1a0865c0d4eccd">faiss::Index::ntotal</a></div><div class="ttdeci">idx_t ntotal</div><div class="ttdoc">total nb of indexed vectors </div><div class="ttdef"><b>Definition:</b> <a href="Index_8h_source.html#l00067">Index.h:67</a></div></div>
<div class="ttc" id="structfaiss_1_1IndexIDMap2_html_a646302669189e370d9d864fc18f096fe"><div class="ttname"><a href="structfaiss_1_1IndexIDMap2.html#a646302669189e370d9d864fc18f096fe">faiss::IndexIDMap2::construct_rev_map</a></div><div class="ttdeci">void construct_rev_map()</div><div class="ttdoc">make the rev_map from scratch </div><div class="ttdef"><b>Definition:</b> <a href="MetaIndexes_8cpp_source.html#l00157">MetaIndexes.cpp:157</a></div></div>
<div class="ttc" id="structfaiss_1_1Index_html_a5590d847c5c2b958affd2a05e58a6f23"><div class="ttname"><a href="structfaiss_1_1Index.html#a5590d847c5c2b958affd2a05e58a6f23">faiss::Index::verbose</a></div><div class="ttdeci">bool verbose</div><div class="ttdoc">verbosity level </div><div class="ttdef"><b>Definition:</b> <a href="Index_8h_source.html#l00068">Index.h:68</a></div></div>
<div class="ttc" id="structfaiss_1_1IndexSplitVectors_html_af2ef88dc72b4a94f1190ecc8cb25881b"><div class="ttname"><a href="structfaiss_1_1IndexSplitVectors.html#af2ef88dc72b4a94f1190ecc8cb25881b">faiss::IndexSplitVectors::add</a></div><div class="ttdeci">void add(idx_t n, const float *x) override</div><div class="ttdef"><b>Definition:</b> <a href="MetaIndexes_8cpp_source.html#l00218">MetaIndexes.cpp:218</a></div></div>
<div class="ttc" id="structfaiss_1_1IndexIDMap2_html_a87e313ebc8dd62fb734a61a6d95a98f0"><div class="ttname"><a href="structfaiss_1_1IndexIDMap2.html#a87e313ebc8dd62fb734a61a6d95a98f0">faiss::IndexIDMap2::remove_ids</a></div><div class="ttdeci">long remove_ids(const IDSelector &amp;sel) override</div><div class="ttdoc">remove ids adapted to IndexFlat </div><div class="ttdef"><b>Definition:</b> <a href="MetaIndexes_8cpp_source.html#l00166">MetaIndexes.cpp:166</a></div></div>
<div class="ttc" id="structfaiss_1_1Index_html_aced51b1ebc33c47ab3ae15ea906559a7"><div class="ttname"><a href="structfaiss_1_1Index.html#aced51b1ebc33c47ab3ae15ea906559a7">faiss::Index::search</a></div><div class="ttdeci">virtual void search(idx_t n, const float *x, idx_t k, float *distances, idx_t *labels) const =0</div></div>
<div class="ttc" id="structfaiss_1_1RangeSearchResult_html"><div class="ttname"><a href="structfaiss_1_1RangeSearchResult.html">faiss::RangeSearchResult</a></div><div class="ttdef"><b>Definition:</b> <a href="AuxIndexStructures_8h_source.html#l00031">AuxIndexStructures.h:31</a></div></div>
<div class="ttc" id="structfaiss_1_1IndexIDMap_html_a70aca5b0f665c5a109d5dadf1e13b448"><div class="ttname"><a href="structfaiss_1_1IndexIDMap.html#a70aca5b0f665c5a109d5dadf1e13b448">faiss::IndexIDMap::reset</a></div><div class="ttdeci">void reset() override</div><div class="ttdoc">removes all elements from the database. </div><div class="ttdef"><b>Definition:</b> <a href="MetaIndexes_8cpp_source.html#l00056">MetaIndexes.cpp:56</a></div></div>
<div class="ttc" id="structfaiss_1_1IndexSplitVectors_html_a4a010daf51e44d9717e94400cc23c159"><div class="ttname"><a href="structfaiss_1_1IndexSplitVectors.html#a4a010daf51e44d9717e94400cc23c159">faiss::IndexSplitVectors::search</a></div><div class="ttdeci">void search(idx_t n, const float *x, idx_t k, float *distances, idx_t *labels) const override</div><div class="ttdef"><b>Definition:</b> <a href="MetaIndexes_8cpp_source.html#l00224">MetaIndexes.cpp:224</a></div></div>
<div class="ttc" id="classfaiss_1_1WorkerThread_html"><div class="ttname"><a href="classfaiss_1_1WorkerThread.html">faiss::WorkerThread</a></div><div class="ttdef"><b>Definition:</b> <a href="WorkerThread_8h_source.html#l00018">WorkerThread.h:18</a></div></div>
<div class="ttc" id="structfaiss_1_1IndexIDMap_html_a699ca4891bf3a437b2a182c04d33d9b9"><div class="ttname"><a href="structfaiss_1_1IndexIDMap.html#a699ca4891bf3a437b2a182c04d33d9b9">faiss::IndexIDMap::remove_ids</a></div><div class="ttdeci">long remove_ids(const IDSelector &amp;sel) override</div><div class="ttdoc">remove ids adapted to IndexFlat </div><div class="ttdef"><b>Definition:</b> <a href="MetaIndexes_8cpp_source.html#l00112">MetaIndexes.cpp:112</a></div></div>
<div class="ttc" id="structfaiss_1_1Index_html_a8e18f641854b2bde83ecff0a2f9a6f4e"><div class="ttname"><a href="structfaiss_1_1Index.html#a8e18f641854b2bde83ecff0a2f9a6f4e">faiss::Index::metric_type</a></div><div class="ttdeci">MetricType metric_type</div><div class="ttdoc">type of metric this index uses for search </div><div class="ttdef"><b>Definition:</b> <a href="Index_8h_source.html#l00074">Index.h:74</a></div></div>
<div class="ttc" id="structfaiss_1_1IndexIDMap2_html_a3660adb35a3299bc328988f5ff2199fe"><div class="ttname"><a href="structfaiss_1_1IndexIDMap2.html#a3660adb35a3299bc328988f5ff2199fe">faiss::IndexIDMap2::reconstruct</a></div><div class="ttdeci">void reconstruct(idx_t key, float *recons) const override</div><div class="ttdef"><b>Definition:</b> <a href="MetaIndexes_8cpp_source.html#l00174">MetaIndexes.cpp:174</a></div></div>
<div class="ttc" id="structfaiss_1_1IndexIDMap_html_ac873cb03aa323a06dca5d6f3af5fe559"><div class="ttname"><a href="structfaiss_1_1IndexIDMap.html#ac873cb03aa323a06dca5d6f3af5fe559">faiss::IndexIDMap::train</a></div><div class="ttdeci">void train(idx_t n, const float *x) override</div><div class="ttdef"><b>Definition:</b> <a href="MetaIndexes_8cpp_source.html#l00050">MetaIndexes.cpp:50</a></div></div>
<div class="ttc" id="structfaiss_1_1Index_html"><div class="ttname"><a href="structfaiss_1_1Index.html">faiss::Index</a></div><div class="ttdef"><b>Definition:</b> <a href="Index_8h_source.html#l00061">Index.h:61</a></div></div>
<div class="ttc" id="structfaiss_1_1RangeSearchResult_html_aef57f9db99ca470c01bcdce0366cb6ff"><div class="ttname"><a href="structfaiss_1_1RangeSearchResult.html#aef57f9db99ca470c01bcdce0366cb6ff">faiss::RangeSearchResult::lims</a></div><div class="ttdeci">size_t * lims</div><div class="ttdoc">size (nq + 1) </div><div class="ttdef"><b>Definition:</b> <a href="AuxIndexStructures_8h_source.html#l00033">AuxIndexStructures.h:33</a></div></div>
<div class="ttc" id="classfaiss_1_1WorkerThread_html_a484b472c878bb35e4fed5f5ec6733d79"><div class="ttname"><a href="classfaiss_1_1WorkerThread.html#a484b472c878bb35e4fed5f5ec6733d79">faiss::WorkerThread::add</a></div><div class="ttdeci">std::future&lt; bool &gt; add(std::function&lt; void()&gt; f)</div><div class="ttdef"><b>Definition:</b> <a href="WorkerThread_8cpp_source.html#l00057">WorkerThread.cpp:57</a></div></div>
<div class="ttc" id="structfaiss_1_1Index_html_a6e92732617c4dbe364e7678dd8773a7f"><div class="ttname"><a href="structfaiss_1_1Index.html#a6e92732617c4dbe364e7678dd8773a7f">faiss::Index::is_trained</a></div><div class="ttdeci">bool is_trained</div><div class="ttdoc">set if the Index does not require training, or if training is done already </div><div class="ttdef"><b>Definition:</b> <a href="Index_8h_source.html#l00071">Index.h:71</a></div></div>
<div class="ttc" id="structfaiss_1_1Index_html_aaef6f4132b1f390121ebb11058baf190"><div class="ttname"><a href="structfaiss_1_1Index.html#aaef6f4132b1f390121ebb11058baf190">faiss::Index::reconstruct</a></div><div class="ttdeci">virtual void reconstruct(idx_t key, float *recons) const </div><div class="ttdef"><b>Definition:</b> <a href="Index_8cpp_source.html#l00054">Index.cpp:54</a></div></div>
<div class="ttc" id="structfaiss_1_1IndexIDMap_html_aeace75e53648c052d05c357b744e090b"><div class="ttname"><a href="structfaiss_1_1IndexIDMap.html#aeace75e53648c052d05c357b744e090b">faiss::IndexIDMap::add_with_ids</a></div><div class="ttdeci">void add_with_ids(idx_t n, const float *x, const long *xids) override</div><div class="ttdef"><b>Definition:</b> <a href="MetaIndexes_8cpp_source.html#l00064">MetaIndexes.cpp:64</a></div></div>
<div class="ttc" id="structfaiss_1_1RangeSearchResult_html_aa8ff848474a4cc16c5464cc4ec187824"><div class="ttname"><a href="structfaiss_1_1RangeSearchResult.html#aa8ff848474a4cc16c5464cc4ec187824">faiss::RangeSearchResult::labels</a></div><div class="ttdeci">idx_t * labels</div><div class="ttdoc">result for query i is labels[lims[i]:lims[i+1]] </div><div class="ttdef"><b>Definition:</b> <a href="AuxIndexStructures_8h_source.html#l00037">AuxIndexStructures.h:37</a></div></div>
<div class="ttc" id="structfaiss_1_1IndexSplitVectors_html_a70ba3367a08722fe4466dc49c21a4d2b"><div class="ttname"><a href="structfaiss_1_1IndexSplitVectors.html#a70ba3367a08722fe4466dc49c21a4d2b">faiss::IndexSplitVectors::IndexSplitVectors</a></div><div class="ttdeci">IndexSplitVectors(idx_t d, bool threaded=false)</div><div class="ttdoc">sum of dimensions seen so far </div><div class="ttdef"><b>Definition:</b> <a href="MetaIndexes_8cpp_source.html#l00188">MetaIndexes.cpp:188</a></div></div>
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